<template>
  <div class="login_container">
    <div class="login_box">
      <!-- 头像区域 -->
      <div class="avatar_box">
        <img src="../assets/logo.png" alt="" />
      </div>
      <!-- 登录表单区域 -->
      <el-form
        ref="loginFormRef"
        class="login_form"
        :model="LoginForm"
        :rules="rules"
      >
        <el-form-item prop="username">
          <el-input
            v-model="LoginForm.username"
            prefix-icon="el-icon-user"
            placeholder="用户名"
          ></el-input>
        </el-form-item>
        <el-form-item prop="password">
          <el-input
            type="password"
            v-model="LoginForm.password"
            prefix-icon="el-icon-key"
            placeholder="密码"
          ></el-input>
        </el-form-item>
        <el-form-item class="btns">
          <el-button type="primary" @click="submitForm">登录</el-button>
          <el-button type="info" @click="resetLoginForm">重置</el-button>
        </el-form-item>
      </el-form>
    </div>
  </div>
</template>
<script>
export default {
  data() {
    return {
      // 登录表单的数据绑定对象
      LoginForm: {
        username: "",
        password: "",
      },
      rules: {
        username: [
          { required: true, message: "请输入登录名称", trigger: "blur" },
          { min: 3, max: 15, message: "长度在 3 到 15个字符", trigger: "blur" },
        ],
        password: [{ required: true, message: "请输入密码", trigger: "blur" }],
      },
    };
  },
  methods: {
    // 重置登录标点
    resetLoginForm() {
      //console.log(this);
      this.$refs.loginFormRef.resetFields();
    },
    // 登录提交数据
    submitForm() {
      this.$refs.loginFormRef.validate(async (valid) => {
        if (!valid) {
          return false;
        }
        const { data: res } = await this.$http.post("login", this.LoginForm);
        if (res.meta.status !== 200) return this.$message.error("登录失败");
        this.$message.success("登录成功");
        // 1 将登录成功之后的token,保存在客户端的sessionStorage中
        // 1.1项目中出了登录值为的其他API接口,必须登录之后才能访问
        // 1.2 token只应在当前网站打开期间生效,所以将token保存在sessionStorage中
        window.sessionStorage.setItem("token", res.data.token);
        // 2 通过编程式导航跳转到后台主页,路由地址为/home
        this.$router.push("/home");
      });
    },
  },
};
</script>
<style lang="scss" scoped>
.login_container {
  background-color: #2b4b6b;
  height: 100%;
  .login_box {
    width: 450px;
    height: 300px;
    background-color: #fff;
    border-radius: 3px;
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
    .avatar_box {
      width: 130px;
      height: 130px;
      padding: 10px;
      border-radius: 50%;
      border: 1px solid #eee;
      box-shadow: 0 0 10px #ddd;
      position: absolute;
      left: 50%;
      transform: translate(-50%, -50%);
      background-color: #fff;
      img {
        width: 100%;
        height: 100%;
        border-radius: 50%;
        background-color: #eee;
      }
    }
  }
}
.login_form {
  position: absolute;
  bottom: 0;
  width: 100%;
  padding: 0 20px;
  box-sizing: border-box;
}
.btns {
  display: flex;
  justify-content: flex-end;
}
</style>
